Water Filtration Works
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In our eReader you can find the full English version of the book. Read Water Filtration Works Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Water Filtration Works
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Soc. C. E., vol. XLiii. p. 296.
184 IVATMJ^ FILTRATION WOR^S.
gravel. At Lawrence, Mass., in 1898, the filters be- came partially clogged, so that their capacity was considerably reduced. An investigation by the State Board of Health revealed in the gravel a growth of crenothrix, which had caused a deposit of iron-rust to such an extent around and between the stones that the water could not pass freely into the under- drains. The growth of crenothrix was found to be due to the pumping of the wa...ter away from the fil- ters too rapidly, thus unduly lowering its level and permitting air to enter the underdrains. The trouble was rectified by excavating a large part of the area and renewing the underdrainage system.
After the annual deep scraping it is customary to loosen up the remaining sand for a depth of several inches and allow the filter to stand for some time, several days in some instances, before refihing with washed sand. The surface, after scraping, is raked over to make it level and smooth and to remove the prints of the workmen's boots.
What to read after Water Filtration Works?
You can find similar books in the "Read Also" column, or choose other free books by Fuertes, James H. (James Hillhouse), 1863-1932 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Soc. C. E., vol. XLiii. p. 296.
184 IVATMJ^ FILTRATION WOR^S.
gravel. At Lawrence, Mass., in 1898, the filters be- came partially clogged, so that their capacity was considerably reduced. An investigation by the State Board of Health revealed in the gravel a growth of crenothrix, which had caused a deposit of iron-rust to such an extent around and between the stones that the water could not pass freely into the under- drains. The growth of crenothrix was found to be due to the pumping of the wa...ter away from the fil- ters too rapidly, thus unduly lowering its level and permitting air to enter the underdrains. The trouble was rectified by excavating a large part of the area and renewing the underdrainage system.
After the annual deep scraping it is customary to loosen up the remaining sand for a depth of several inches and allow the filter to stand for some time, several days in some instances, before refihing with washed sand. The surface, after scraping, is raked over to make it level and smooth and to remove the prints of the workmen's boots.
What to read after Water Filtration Works?
You can find similar books in the "Read Also" column, or choose other free books by Fuertes, James H. (James Hillhouse), 1863-1932 to read onlineMoreLess
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